Series B. 



Vol. I. Fascicle ii 



PAL^ONTOLOGIA SINICA 



Editors: 



V. K. Ting and Y. C. Sun 



The Ordovician Cephalopoda of Central China 



BY 



C. C. YU 



Geologist to the National Research Institute of Geology 



With IX Plates and 7 Text figures 



0t¥^ 



Published by the Geological Survey of China; 



Section of Geology, National Academy of Peipin^ 



Peiping 1930. 



